$ git clone -n https://src.fedoraproject.org/rpms/picom.git /var/lib/mock/f39-build-1535792-36250/root/chroot_tmpdir/scmroot/picom
Cloning into '/var/lib/mock/f39-build-1535792-36250/root/chroot_tmpdir/scmroot/picom'...
$ git fetch origin 5596ae78eca62ea8a8175482005445f6aed0e420:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/picom
 * [new ref]         5596ae78eca62ea8a8175482005445f6aed0e420 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5596ae7 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild