$ git clone -n https://src.fedoraproject.org/rpms/shellz.git /var/lib/mock/f42-build-866815-174160/root/chroot_tmpdir/scmroot/shellz
Cloning into '/var/lib/mock/f42-build-866815-174160/root/chroot_tmpdir/scmroot/shellz'...
$ git fetch origin 2898e1869285716664f2c60fe029d6782020a81e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/shellz
 * [new ref]         2898e1869285716664f2c60fe029d6782020a81e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2898e18 Update to 1.6.0 - Closes rhbz#2315636