$ git clone -n https://src.fedoraproject.org/rpms/maven-shared-incremental.git /var/lib/mock/f40-build-2238250-53561/root/chroot_tmpdir/scmroot/maven-shared-incremental
Cloning into '/var/lib/mock/f40-build-2238250-53561/root/chroot_tmpdir/scmroot/maven-shared-incremental'...
$ git fetch origin 5e6a804112e74276123c7ac8200f9532d8e9fdfd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/maven-shared-incremental
 * [new ref]         5e6a804112e74276123c7ac8200f9532d8e9fdfd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5e6a804 Update javapackages test plan to f40