$ git clone -n https://src.fedoraproject.org/rpms/bluedevil.git /var/lib/mock/f42-build-side-1-3568042-46743/root/chroot_tmpdir/scmroot/bluedevil
Cloning into '/var/lib/mock/f42-build-side-1-3568042-46743/root/chroot_tmpdir/scmroot/bluedevil'...
$ git fetch origin f3d4b5a93fb8f1ee98288ea812aaca644780b2c5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bluedevil
 * [new ref]         f3d4b5a93fb8f1ee98288ea812aaca644780b2c5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f3d4b5a 6.4.0