$ git clone -n https://src.fedoraproject.org/rpms/fossil.git /var/lib/mock/f41-build-side-1-3133830-39704/root/chroot_tmpdir/scmroot/fossil
Cloning into '/var/lib/mock/f41-build-side-1-3133830-39704/root/chroot_tmpdir/scmroot/fossil'...
$ git fetch origin 60b315cfe33023e29a77a1b263064c6cb26cbe24:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fossil
 * [new ref]         60b315cfe33023e29a77a1b263064c6cb26cbe24 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 60b315c Merge branch 'rawhide' into f41