$ git clone -n https://src.fedoraproject.org/rpms/happy.git /var/lib/mock/f41-build-838854-159865/root/chroot_tmpdir/scmroot/happy
Cloning into '/var/lib/mock/f41-build-838854-159865/root/chroot_tmpdir/scmroot/happy'...
$ git fetch origin b3f2b0c5236966d5272468bffd35b2c2d0e32dd4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/happy
 * [new ref]         b3f2b0c5236966d5272468bffd35b2c2d0e32dd4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b3f2b0c bump release