$ git clone -n https://src.fedoraproject.org/rpms/apache-commons-logging.git /var/lib/mock/f39-build-1808147-41827/root/chroot_tmpdir/scmroot/apache-commons-logging
Cloning into '/var/lib/mock/f39-build-1808147-41827/root/chroot_tmpdir/scmroot/apache-commons-logging'...
$ git fetch origin c50c7005665ebbb96eb2784d69f49f14b6563c38:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/apache-commons-logging
 * [new ref]         c50c7005665ebbb96eb2784d69f49f14b6563c38 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c50c700 Build with log4j support in non-bootstrap mode