$ git clone -n https://src.fedoraproject.org/rpms/picom.git /var/lib/mock/f41-build-side-1-3129985-39588/root/chroot_tmpdir/scmroot/picom
Cloning into '/var/lib/mock/f41-build-side-1-3129985-39588/root/chroot_tmpdir/scmroot/picom'...
$ git fetch origin bb36b4ebf22df2b56a4c79bc9c888450bccdd4d5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/picom
 * [new ref]         bb36b4ebf22df2b56a4c79bc9c888450bccdd4d5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bb36b4e Update to 12.4 upstream release