$ git clone -n https://src.fedoraproject.org/rpms/pari-galpol.git /var/lib/mock/f45-build-21396-584/root/chroot_tmpdir/scmroot/pari-galpol
Cloning into '/var/lib/mock/f45-build-21396-584/root/chroot_tmpdir/scmroot/pari-galpol'...
$ git fetch origin 16a8be5e5582c7fa3d0cd3c4606609fa2b02f90d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pari-galpol
 * [new ref]         16a8be5e5582c7fa3d0cd3c4606609fa2b02f90d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 16a8be5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild