$ git clone -n https://src.fedoraproject.org/rpms/bluefish.git /var/lib/mock/f40-build-1991806-43523/root/chroot_tmpdir/scmroot/bluefish
Cloning into '/var/lib/mock/f40-build-1991806-43523/root/chroot_tmpdir/scmroot/bluefish'...
$ git fetch origin bf0f05e27d68658d9293da28500a984690839230:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bluefish
 * [new ref]         bf0f05e27d68658d9293da28500a984690839230 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bf0f05e Don't mix spaces and tabs