While climbing SRT, I changed my route between ascent and descent past a big old limb........
Lots of ways but for me it is going to be more sloth like.
You have a cinched canopy anchor, or it could be a base tie but I would have the tail below me with a DdRT system attached. I also always carry either a small prusik or most often a hand ascender with revolver ( I use it when I need to put a 3:1 on the SRT line).
1. So the tail is going to have to be pulled over the branch soon or later so I do it sooner, pull it up if you don't already have it, attach that DdRT system end to the re-direct branch and attach to my bridge, take the weight off the SRT line. ... (or use my lanyard DdRT style to the center attachment on my bridge.)
2. Make sure the redirect branch will support your weight because you are giving it more than it had before. (angles) If my lanyard will reach, I can swing it over the neighboring branch for back up. (visa versa tail and lanyard if needed)
3. Don't disconnect from the SRT system but let it have enough slack to let the other side sag down until I can attach the hand ascender or pursik. Clip into it, your safe if the redirect lets go, except for the swing. (in that case perhaps step 2 was not well evaluated.
4. Disconnect from your SRT system and pull it over the redirect and clip back into it.
5. Put your weight back on the SRT system, remove the prusik.
6. Let out the DdRT tail to swing slowly back to the stem.