$ git clone -n https://src.fedoraproject.org/rpms/bluedevil.git /var/lib/mock/f40-build-2488542-61651/root/chroot_tmpdir/scmroot/bluedevil
Cloning into '/var/lib/mock/f40-build-2488542-61651/root/chroot_tmpdir/scmroot/bluedevil'...
$ git fetch origin 5e6ac19cc627d14b9b56b14eabc85e1c57a9abeb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bluedevil
 * [new ref]         5e6ac19cc627d14b9b56b14eabc85e1c57a9abeb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5e6ac19 6.0.0