$ git clone -n https://src.fedoraproject.org/rpms/rest0.7.git /var/lib/mock/f45-build-34482-687/root/chroot_tmpdir/scmroot/rest0.7
Cloning into '/var/lib/mock/f45-build-34482-687/root/chroot_tmpdir/scmroot/rest0.7'...
$ git fetch origin 0d773e5385993b65abcd71fe57f44651e71c207a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rest0.7
 * [new ref]         0d773e5385993b65abcd71fe57f44651e71c207a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0d773e5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild