$ git clone -n https://src.fedoraproject.org/rpms/python-kerberos.git /var/lib/mock/f40-build-2213813-52350/root/chroot_tmpdir/scmroot/python-kerberos
Cloning into '/var/lib/mock/f40-build-2213813-52350/root/chroot_tmpdir/scmroot/python-kerberos'...
$ git fetch origin 1f9fc222b4572b4804447289c05510a2ef410a71:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-kerberos
 * [new ref]         1f9fc222b4572b4804447289c05510a2ef410a71 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1f9fc22 Python.h no longer includes <unistd.h>