$ git clone -n https://src.fedoraproject.org/rpms/pypy.git /var/lib/mock/f40-build-770871-125901/root/chroot_tmpdir/scmroot/pypy
Cloning into '/var/lib/mock/f40-build-770871-125901/root/chroot_tmpdir/scmroot/pypy'...
$ git fetch origin 801e654a17ea0a576e170cd1b9179bfc33ac1515:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pypy
 * [new ref]         801e654a17ea0a576e170cd1b9179bfc33ac1515 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 801e654 Update to 7.3.13