$ git clone -n https://src.fedoraproject.org/rpms/apache-commons-codec.git /var/lib/mock/f41-build-1232009-22865/root/chroot_tmpdir/scmroot/apache-commons-codec
Cloning into '/var/lib/mock/f41-build-1232009-22865/root/chroot_tmpdir/scmroot/apache-commons-codec'...
$ git fetch origin d2cdaafc7fe96fc899e880fec5eb8ea487a8f449:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/apache-commons-codec
 * [new ref]         d2cdaafc7fe96fc899e880fec5eb8ea487a8f449 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d2cdaaf Update to upstream version 1.16.1