$ git clone -n https://src.fedoraproject.org/rpms/libpgf.git /var/lib/mock/f45-build-16786-491/root/chroot_tmpdir/scmroot/libpgf
Cloning into '/var/lib/mock/f45-build-16786-491/root/chroot_tmpdir/scmroot/libpgf'...
$ git fetch origin 335982dc3a65c02c2bc716a7a4090ba1ec93ba2f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libpgf
 * [new ref]         335982dc3a65c02c2bc716a7a4090ba1ec93ba2f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 335982d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild