$ git clone -n https://src.fedoraproject.org/rpms/python-nbconvert.git /var/lib/mock/f40-build-2321122-58533/root/chroot_tmpdir/scmroot/python-nbconvert
Cloning into '/var/lib/mock/f40-build-2321122-58533/root/chroot_tmpdir/scmroot/python-nbconvert'...
$ git fetch origin a8644826226b1a0c0e8ae84f6d140ca0ecbc60d3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-nbconvert
 * [new ref]         a8644826226b1a0c0e8ae84f6d140ca0ecbc60d3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a864482 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild