$ git clone -n https://src.fedoraproject.org/rpms/maven-plugin-testing.git /var/lib/mock/f40-build-2049886-49017/root/chroot_tmpdir/scmroot/maven-plugin-testing
Cloning into '/var/lib/mock/f40-build-2049886-49017/root/chroot_tmpdir/scmroot/maven-plugin-testing'...
$ git fetch origin 4843efdac1327d3e31f0442f74171255bc401fc0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/maven-plugin-testing
 * [new ref]         4843efdac1327d3e31f0442f74171255bc401fc0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4843efd Update javapackages test plan to f40