$ git clone -n https://src.fedoraproject.org/rpms/gir-to-d.git /var/lib/mock/f41-build-855465-167147/root/chroot_tmpdir/scmroot/gir-to-d
Cloning into '/var/lib/mock/f41-build-855465-167147/root/chroot_tmpdir/scmroot/gir-to-d'...
$ git fetch origin 56076f12b501526be23b32b3c44937e1e89a7059:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gir-to-d
 * [new ref]         56076f12b501526be23b32b3c44937e1e89a7059 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 56076f1 Rebuilt for ldc 1.39