$ git clone -n https://src.fedoraproject.org/rpms/gir-to-d.git /var/lib/mock/f40-build-2213492-52311/root/chroot_tmpdir/scmroot/gir-to-d
Cloning into '/var/lib/mock/f40-build-2213492-52311/root/chroot_tmpdir/scmroot/gir-to-d'...
$ git fetch origin d8a1941af43aeb8b3b02d61f7cfcab53e156eca1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gir-to-d
 * [new ref]         d8a1941af43aeb8b3b02d61f7cfcab53e156eca1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d8a1941 Rebuilt for ldc 1.35