$ git clone -n https://src.fedoraproject.org/rpms/docker-distribution.git /var/lib/mock/f45-build-20050-565/root/chroot_tmpdir/scmroot/docker-distribution
Cloning into '/var/lib/mock/f45-build-20050-565/root/chroot_tmpdir/scmroot/docker-distribution'...
$ git fetch origin 8ee44aa2aa650b7083286e1f86e1a521bf7efc79:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/docker-distribution
 * [new ref]         8ee44aa2aa650b7083286e1f86e1a521bf7efc79 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8ee44aa Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild