Air carrier flight attendant reported the flight attendant crew was informed by the pilots of a possible cargo fire. Flight crew diverted and landed safely.

Narrative

I was on my break in the bunks when the purser notified us we would be landing imminently due to a suspected fire in the cargo hold and [priority handling] had been requested onboard. The fire indicators had been going on and off in the flight deck for the cargo which initiated setting off the extinguishers and other cooling measures on the aircraft. The IFE (In Flight Entertainment) and other electronic controls were not working due to overheating. We were told there was a possibility of a ditching as the weather was too poor in ZZZZ1 to land there and they weren't sure what our options were. Meanwhile the galley was secured and power turned off. It was then decided we were to land in ZZZZ as a precautionary landing. The pilots informed the passengers that there was signs of smoke in the cargo and we would be diverting to ZZZZ and landing in 25 minutes. The crew prepares the cabin for landing as usual and took our jump seats. Upon landing [priority handling] vehicles were there and inspected the aircraft for probably a half hour. I smelled smoke but later was informed it could have been from the cargo extinguishers. They couldn't detect any heat from the outside so the aircraft was deemed unnecessary to evacuate. Then we parked the aircraft and had to wait about another half hour for any busses to arrive to deplane the passengers cabin by cabin to get in the busses. That took probably an hour. Then the crew deplaned. We sat on the bus for probably another half hour and firefighters came on saying they had only found evidence of condensation at that point; no fire. We were told we would not be getting back on that aircraft and our new plan was to lay over for the day and take the passengers in a new plane to ZZZZ2 at XA:00 pm; lay over for 28 hours and ZZZZ3 back to ZZZ (and they reflected that). Customs agents weren't there quite yet so the customs process took a very long time. I believe we got to the airport hotel at XB:45am. We were given minimum rest. We were told pickup was XB:30pm. There were very few food options around. I didn't hear anything from anyone until about XB:15pm the purser called my room informing me we were staying the night and leaving in the morning and he would give me more info shortly. 10 min later the FO called my room and said we were leaving tonight and come downstairs asap. At this time I found out the passengers had been flown to ZZZ1 earlier in the day in a plane flown in from ZZZ1. We all went to the airport where customs had gone home so we had to be escorted through the airport and then driven 4 at a time to the plane where maintenance was still working and they were still taking the cargo off. I was not asked if I was willing to work the original plane we had flown in. During that time a cargo pod of okra was taken out of cargo that was smoking and smoldering and hot to the touch. The pilot went out to investigate but it had been taken away. After probably an hour and a half on the aircraft I think we took off for ZZZ1 around XC:30 in the morning. Landed in ZZZ1 around XE:30 or XF:00 am where we went through customs and went to the hotel shuttle area to then be told there weren't enough rooms at the hotel so the captain called hotel limo and we split into two groups. We had minimum rest. At XE:00 pm we took the shuttle to ZZZ1 and we deadheaded back to ZZZ. There was someone from flight service who met the plane. Other than that I have never been called by the company or union to be checked in with.