$ git clone -n https://src.fedoraproject.org/rpms/python-jinja2.git /var/lib/mock/f45-build-39483-735/root/chroot_tmpdir/scmroot/python-jinja2
Cloning into '/var/lib/mock/f45-build-39483-735/root/chroot_tmpdir/scmroot/python-jinja2'...
$ git fetch origin 435d0c9bc3c621638d731fa50f5f64b557394662:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-jinja2
 * [new ref]         435d0c9bc3c621638d731fa50f5f64b557394662 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 435d0c9 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild