$ git clone -n https://src.fedoraproject.org/rpms/log4j.git /var/lib/mock/f41-build-1605643-24064/root/chroot_tmpdir/scmroot/log4j
Cloning into '/var/lib/mock/f41-build-1605643-24064/root/chroot_tmpdir/scmroot/log4j'...
$ git fetch origin 37b6592d15ba1b9fefefc966b281fca76bcdf4df:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/log4j
 * [new ref]         37b6592d15ba1b9fefefc966b281fca76bcdf4df -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 37b6592 Extract smoke tests out of test plan