$ git clone -n https://src.fedoraproject.org/rpms/cosmic-launcher.git /var/lib/mock/f41-build-side-1-3098670-39333/root/chroot_tmpdir/scmroot/cosmic-launcher
Cloning into '/var/lib/mock/f41-build-side-1-3098670-39333/root/chroot_tmpdir/scmroot/cosmic-launcher'...
$ git fetch origin c791436cb84936f890961ccd2b8b0c16563d5cd4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cosmic-launcher
 * [new ref]         c791436cb84936f890961ccd2b8b0c16563d5cd4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c791436 "Update to 1.0.0~alpha.3"