$ git clone -n https://src.fedoraproject.org/rpms/apache-commons-exec.git /var/lib/mock/f40-build-2473333-61493/root/chroot_tmpdir/scmroot/apache-commons-exec
Cloning into '/var/lib/mock/f40-build-2473333-61493/root/chroot_tmpdir/scmroot/apache-commons-exec'...
$ git fetch origin be598b6eac5da4018a2a633a6cd06c083b2116d4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/apache-commons-exec
 * [new ref]         be598b6eac5da4018a2a633a6cd06c083b2116d4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at be598b6 Port to apache-commons-parent 65