$ git clone -n https://src.fedoraproject.org/rpms/gambas3.git /var/lib/mock/f42-build-3441067-45451/root/chroot_tmpdir/scmroot/gambas3
Cloning into '/var/lib/mock/f42-build-3441067-45451/root/chroot_tmpdir/scmroot/gambas3'...
$ git fetch origin cbf702cf69c07cc4eb2a8df84b663cda76e709f3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gambas3
 * [new ref]         cbf702cf69c07cc4eb2a8df84b663cda76e709f3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cbf702c 3.20.2