$ git clone -n https://src.fedoraproject.org/rpms/bluedevil.git /var/lib/mock/f41-build-side-1-3065380-38603/root/chroot_tmpdir/scmroot/bluedevil
Cloning into '/var/lib/mock/f41-build-side-1-3065380-38603/root/chroot_tmpdir/scmroot/bluedevil'...
$ git fetch origin b8325ecdc842d3a6e67de9d82c1d4ed4a684d9d1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bluedevil
 * [new ref]         b8325ecdc842d3a6e67de9d82c1d4ed4a684d9d1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b8325ec 6.2.3