$ git clone -n https://src.fedoraproject.org/rpms/bluefish.git /var/lib/mock/f42-build-side-1-3501413-45974/root/chroot_tmpdir/scmroot/bluefish
Cloning into '/var/lib/mock/f42-build-side-1-3501413-45974/root/chroot_tmpdir/scmroot/bluefish'...
$ git fetch origin 9f5912a653467ad2d0a23de5f44f7bb001be20cf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bluefish
 * [new ref]         9f5912a653467ad2d0a23de5f44f7bb001be20cf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9f5912a Update to 2.2.17 (rhbz#2356356)