$ git clone -n https://src.fedoraproject.org/rpms/cosmic-workspaces.git /var/lib/mock/f41-build-side-1-3097278-39322/root/chroot_tmpdir/scmroot/cosmic-workspaces
Cloning into '/var/lib/mock/f41-build-side-1-3097278-39322/root/chroot_tmpdir/scmroot/cosmic-workspaces'...
$ git fetch origin 17ef84e152117915fc393e6f93c704825298033e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cosmic-workspaces
 * [new ref]         17ef84e152117915fc393e6f93c704825298033e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 17ef84e "Update to 1.0.0~alpha.3"