$ git clone -n https://src.fedoraproject.org/rpms/maven-shared-io.git /var/lib/mock/f40-build-2104911-50574/root/chroot_tmpdir/scmroot/maven-shared-io
Cloning into '/var/lib/mock/f40-build-2104911-50574/root/chroot_tmpdir/scmroot/maven-shared-io'...
$ git fetch origin 950618499ae4f2aec82d6995f4c8e00734bf911d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/maven-shared-io
 * [new ref]         950618499ae4f2aec82d6995f4c8e00734bf911d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9506184 Update javapackages test plan to f40