$ git clone -n https://src.fedoraproject.org/rpms/pdf-stapler.git /var/lib/mock/f45-build-21500-586/root/chroot_tmpdir/scmroot/pdf-stapler
Cloning into '/var/lib/mock/f45-build-21500-586/root/chroot_tmpdir/scmroot/pdf-stapler'...
$ git fetch origin ff70f4c042718533cae1306d04c3f728bf00c0c8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pdf-stapler
 * [new ref]         ff70f4c042718533cae1306d04c3f728bf00c0c8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ff70f4c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild