$ git clone -n https://src.fedoraproject.org/rpms/exec-maven-plugin.git /var/lib/mock/f41-build-1841951-24963/root/chroot_tmpdir/scmroot/exec-maven-plugin
Cloning into '/var/lib/mock/f41-build-1841951-24963/root/chroot_tmpdir/scmroot/exec-maven-plugin'...
$ git fetch origin 0a3a0fc3c595193efc36f1a6d6a154414e6f25a2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/exec-maven-plugin
 * [new ref]         0a3a0fc3c595193efc36f1a6d6a154414e6f25a2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0a3a0fc convert ASL 2.0 license to SPDX