$ git clone -n https://src.fedoraproject.org/rpms/apache-commons-compress.git /var/lib/mock/f40-build-2102791-50554/root/chroot_tmpdir/scmroot/apache-commons-compress
Cloning into '/var/lib/mock/f40-build-2102791-50554/root/chroot_tmpdir/scmroot/apache-commons-compress'...
$ git fetch origin 47315259e66184814c6ccfaa20be13b46461b2a8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/apache-commons-compress
 * [new ref]         47315259e66184814c6ccfaa20be13b46461b2a8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4731525 Update to upstream version 1.25.0