$ git clone -n https://src.fedoraproject.org/rpms/cosmic-randr.git /var/lib/mock/f41-build-side-1-3095127-39308/root/chroot_tmpdir/scmroot/cosmic-randr
Cloning into '/var/lib/mock/f41-build-side-1-3095127-39308/root/chroot_tmpdir/scmroot/cosmic-randr'...
$ git fetch origin 407098892a10475f692de641b616c4ea85b07246:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cosmic-randr
 * [new ref]         407098892a10475f692de641b616c4ea85b07246 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4070988 "Update to 1.0.0~alpha.3"