$ git clone -n https://src.fedoraproject.org/rpms/python-saneyaml.git /var/lib/mock/f45-build-32871-664/root/chroot_tmpdir/scmroot/python-saneyaml
Cloning into '/var/lib/mock/f45-build-32871-664/root/chroot_tmpdir/scmroot/python-saneyaml'...
$ git fetch origin 5114ead983f8a4fa1e674aa05840edfedaf8869c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-saneyaml
 * [new ref]         5114ead983f8a4fa1e674aa05840edfedaf8869c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5114ead Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild