$ git clone -n https://src.fedoraproject.org/rpms/python3.9.git /var/lib/mock/f45-build-33809-674/root/chroot_tmpdir/scmroot/python3.9
Cloning into '/var/lib/mock/f45-build-33809-674/root/chroot_tmpdir/scmroot/python3.9'...
$ git fetch origin f63f51255ddd07ceefcf76a012d6a40d3fafd2f6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python3.9
 * [new ref]         f63f51255ddd07ceefcf76a012d6a40d3fafd2f6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f63f512  Skip UDP Lite tests if it's not supported