$ git clone -n https://src.fedoraproject.org/rpms/python-ruamel-yaml.git /var/lib/mock/f45-build-32840-664/root/chroot_tmpdir/scmroot/python-ruamel-yaml
Cloning into '/var/lib/mock/f45-build-32840-664/root/chroot_tmpdir/scmroot/python-ruamel-yaml'...
$ git fetch origin 749e98807032b5e25544e3d97dcc4019ccd17772:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-ruamel-yaml
 * [new ref]         749e98807032b5e25544e3d97dcc4019ccd17772 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 749e988 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild