$ git clone -n https://src.fedoraproject.org/rpms/gir-to-d.git /var/lib/mock/f38-build-side-42-init-devel-1282504-30671/root/chroot_tmpdir/scmroot/gir-to-d
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1282504-30671/root/chroot_tmpdir/scmroot/gir-to-d'...
$ git fetch origin 6f64cfa37128d02f73060e84fcd932c25ebacdd5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gir-to-d
 * [new ref]         6f64cfa37128d02f73060e84fcd932c25ebacdd5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6f64cfa Rebuilt for ldc 1.32