$ git clone -n https://src.fedoraproject.org/rpms/vkmark.git /var/lib/mock/f45-build-38109-720/root/chroot_tmpdir/scmroot/vkmark
Cloning into '/var/lib/mock/f45-build-38109-720/root/chroot_tmpdir/scmroot/vkmark'...
$ git fetch origin 94ebb3b9e271da12d59769bd8bc3d4115286bfee:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vkmark
 * [new ref]         94ebb3b9e271da12d59769bd8bc3d4115286bfee -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 94ebb3b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild