$ git clone -n https://src.fedoraproject.org/rpms/pari-galdata.git /var/lib/mock/f45-build-21393-584/root/chroot_tmpdir/scmroot/pari-galdata
Cloning into '/var/lib/mock/f45-build-21393-584/root/chroot_tmpdir/scmroot/pari-galdata'...
$ git fetch origin 7b91ad8b869b6ba76e4cd4e634cd6e75d0fd753f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pari-galdata
 * [new ref]         7b91ad8b869b6ba76e4cd4e634cd6e75d0fd753f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7b91ad8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild