$ git clone -n https://src.fedoraproject.org/rpms/python-networkx.git /var/lib/mock/f38-build-side-42-init-devel-687483-26763/root/chroot_tmpdir/scmroot/python-networkx
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-687483-26763/root/chroot_tmpdir/scmroot/python-networkx'...
$ git fetch origin 38581803ea33265aa5c54be63fd0cf792fd8cfb5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-networkx
 * [new ref]         38581803ea33265aa5c54be63fd0cf792fd8cfb5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3858180 BuildRequire pyproject-rpm-macros explicitly (for ELN)