$ git clone -n https://src.fedoraproject.org/rpms/maven-shared-incremental.git /var/lib/mock/f42-build-3273895-41313/root/chroot_tmpdir/scmroot/maven-shared-incremental
Cloning into '/var/lib/mock/f42-build-3273895-41313/root/chroot_tmpdir/scmroot/maven-shared-incremental'...
$ git fetch origin 2c93bc8140c22aa20f18a37f27611e375fedbde9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/maven-shared-incremental
 * [new ref]         2c93bc8140c22aa20f18a37f27611e375fedbde9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2c93bc8 Fix incorrect parent relativePath