$ git clone -n https://src.fedoraproject.org/rpms/gd.git /var/lib/mock/f41-build-1035000-18652/root/chroot_tmpdir/scmroot/gd
Cloning into '/var/lib/mock/f41-build-1035000-18652/root/chroot_tmpdir/scmroot/gd'...
$ git fetch origin 28a7ac481ea19989414b6d011d1b1555d866d3e1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gd
 * [new ref]         28a7ac481ea19989414b6d011d1b1555d866d3e1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 28a7ac4 Eliminate use of obsolete %patchN syntax (#2283636)