$ git clone -n https://src.fedoraproject.org/rpms/gnome-desktop3.git /var/lib/mock/f40-build-2240744-53645/root/chroot_tmpdir/scmroot/gnome-desktop3
Cloning into '/var/lib/mock/f40-build-2240744-53645/root/chroot_tmpdir/scmroot/gnome-desktop3'...
$ git fetch origin 697e80ee940a28cbbbc7fa6c8bb2df4c886a7f0c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-desktop3
 * [new ref]         697e80ee940a28cbbbc7fa6c8bb2df4c886a7f0c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 697e80e Address niche edge case with certain bulgarian layouts