$ git clone -n https://src.fedoraproject.org/rpms/freefem++.git /var/lib/mock/f45-build-9236-400/root/chroot_tmpdir/scmroot/freefem++
Cloning into '/var/lib/mock/f45-build-9236-400/root/chroot_tmpdir/scmroot/freefem++'...
$ git fetch origin 308ebde91dece15fbb79068fb3347768f65c10b0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/freefem++
 * [new ref]         308ebde91dece15fbb79068fb3347768f65c10b0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 308ebde Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild