$ git clone -n https://src.fedoraproject.org/rpms/rsgain.git /var/lib/mock/f41-build-side-1-2768946-32100/root/chroot_tmpdir/scmroot/rsgain
Cloning into '/var/lib/mock/f41-build-side-1-2768946-32100/root/chroot_tmpdir/scmroot/rsgain'...
$ git fetch origin bc681009bfe4e0a29e754268a11ffd81982e3b73:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rsgain
 * [new ref]         bc681009bfe4e0a29e754268a11ffd81982e3b73 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bc68100 Rebuild for ffmpeg 7