$ git clone -n https://src.fedoraproject.org/rpms/gtk-doc.git /var/lib/mock/f40-build-790858-136879/root/chroot_tmpdir/scmroot/gtk-doc
Cloning into '/var/lib/mock/f40-build-790858-136879/root/chroot_tmpdir/scmroot/gtk-doc'...
$ git fetch origin cfcf9b18ffe7b84b8eefd732c391b2d4f1ff88c3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gtk-doc
 * [new ref]         cfcf9b18ffe7b84b8eefd732c391b2d4f1ff88c3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cfcf9b1 Add gobject exampledir to path for mkhtml test