$ git clone -n https://src.fedoraproject.org/rpms/python-ptrace.git /var/lib/mock/f40-build-803962-144396/root/chroot_tmpdir/scmroot/python-ptrace
Cloning into '/var/lib/mock/f40-build-803962-144396/root/chroot_tmpdir/scmroot/python-ptrace'...
$ git fetch origin a377799810c872b520dc8b7310282f5993c52780:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-ptrace
 * [new ref]         a377799810c872b520dc8b7310282f5993c52780 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a377799 0.9.9