$ git clone -n https://src.fedoraproject.org/rpms/python-flufl-lock.git /var/lib/mock/f45-build-30755-647/root/chroot_tmpdir/scmroot/python-flufl-lock
Cloning into '/var/lib/mock/f45-build-30755-647/root/chroot_tmpdir/scmroot/python-flufl-lock'...
$ git fetch origin 0773e055d3765bb4324ca2d0a620add8eb8d73a5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-flufl-lock
 * [new ref]         0773e055d3765bb4324ca2d0a620add8eb8d73a5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0773e05 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild