$ git clone -n https://src.fedoraproject.org/rpms/gf2x.git /var/lib/mock/f42-build-3274258-41315/root/chroot_tmpdir/scmroot/gf2x
Cloning into '/var/lib/mock/f42-build-3274258-41315/root/chroot_tmpdir/scmroot/gf2x'...
$ git fetch origin 6e7f71fac3811a6a35976f6ecb83537bdcaa3cba:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gf2x
 * [new ref]         6e7f71fac3811a6a35976f6ecb83537bdcaa3cba -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6e7f71f Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild