$ git clone -n https://src.fedoraproject.org/rpms/python-nitrate.git /var/lib/mock/f45-build-31937-656/root/chroot_tmpdir/scmroot/python-nitrate
Cloning into '/var/lib/mock/f45-build-31937-656/root/chroot_tmpdir/scmroot/python-nitrate'...
$ git fetch origin b237b60cb175f6df9b78dcba989626925629a263:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-nitrate
 * [new ref]         b237b60cb175f6df9b78dcba989626925629a263 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b237b60 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild