$ git clone -n https://src.fedoraproject.org/rpms/gap.git /var/lib/mock/f45-build-10047-412/root/chroot_tmpdir/scmroot/gap
Cloning into '/var/lib/mock/f45-build-10047-412/root/chroot_tmpdir/scmroot/gap'...
$ git fetch origin a9072a97816baa8553419d3d71d1b9e2b259ca09:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap
 * [new ref]         a9072a97816baa8553419d3d71d1b9e2b259ca09 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a9072a9 Version 4.16.1