$ git clone -n https://src.fedoraproject.org/rpms/javapackages-tools-epel.git /var/lib/mock/f41-build-side-1-3089617-39246/root/chroot_tmpdir/scmroot/javapackages-tools-epel
Cloning into '/var/lib/mock/f41-build-side-1-3089617-39246/root/chroot_tmpdir/scmroot/javapackages-tools-epel'...
$ git fetch origin 06c5597bb0eaa5ac066984b0ac6e0ba470d8abed:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/javapackages-tools-epel
 * [new ref]         06c5597bb0eaa5ac066984b0ac6e0ba470d8abed -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 06c5597 Added the README