$ git clone -n https://src.fedoraproject.org/rpms/dirvish.git /var/lib/mock/f45-build-7613-367/root/chroot_tmpdir/scmroot/dirvish
Cloning into '/var/lib/mock/f45-build-7613-367/root/chroot_tmpdir/scmroot/dirvish'...
$ git fetch origin 4fd25e90f68e05bdbe7d0c52223144f68b982da1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dirvish
 * [new ref]         4fd25e90f68e05bdbe7d0c52223144f68b982da1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4fd25e9 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild