$ git clone -n https://src.fedoraproject.org/rpms/Carla.git /var/lib/mock/f41-build-side-1-2817876-32992/root/chroot_tmpdir/scmroot/Carla
Cloning into '/var/lib/mock/f41-build-side-1-2817876-32992/root/chroot_tmpdir/scmroot/Carla'...
$ git fetch origin 3101a153c7bc2ed2ded4b918c605b361faf4d834:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/Carla
 * [new ref]         3101a153c7bc2ed2ded4b918c605b361faf4d834 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3101a15 Backport PR #1933 to support pyliblo3 for F41+