$ git clone -n https://src.fedoraproject.org/rpms/ipv6calc.git /var/lib/mock/f38-build-728581-101304/root/chroot_tmpdir/scmroot/ipv6calc
Cloning into '/var/lib/mock/f38-build-728581-101304/root/chroot_tmpdir/scmroot/ipv6calc'...
$ git fetch origin 972e507cec04f86c44ff68462adf3110a99ed3bd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ipv6calc
 * [new ref]         972e507cec04f86c44ff68462adf3110a99ed3bd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 972e507 Increase build requirement IP2Location 8.6.0 to support new DB-26