$ git clone -n https://src.fedoraproject.org/rpms/python-jdcal.git /var/lib/mock/f45-build-31211-651/root/chroot_tmpdir/scmroot/python-jdcal
Cloning into '/var/lib/mock/f45-build-31211-651/root/chroot_tmpdir/scmroot/python-jdcal'...
$ git fetch origin 3592758b0377882b3b70f1232ac4bf5f905ec4ac:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-jdcal
 * [new ref]         3592758b0377882b3b70f1232ac4bf5f905ec4ac -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3592758 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild