$ git clone -n https://src.fedoraproject.org/rpms/jacoco.git /var/lib/mock/f42-build-3367097-45050/root/chroot_tmpdir/scmroot/jacoco
Cloning into '/var/lib/mock/f42-build-3367097-45050/root/chroot_tmpdir/scmroot/jacoco'...
$ git fetch origin 74d8d287ef29ed9822ff953b0b8c1ecd6931c5f8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jacoco
 * [new ref]         74d8d287ef29ed9822ff953b0b8c1ecd6931c5f8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 74d8d28 Add patch for maven-doxia 2.0.0