$ git clone -n https://src.fedoraproject.org/rpms/python-sphinxtesters.git /var/lib/mock/f39-build-1594980-38323/root/chroot_tmpdir/scmroot/python-sphinxtesters
Cloning into '/var/lib/mock/f39-build-1594980-38323/root/chroot_tmpdir/scmroot/python-sphinxtesters'...
$ git fetch origin f6cf4a9dd0f438a4d3b07e1a859c1c458e9c38f1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-sphinxtesters
 * [new ref]         f6cf4a9dd0f438a4d3b07e1a859c1c458e9c38f1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f6cf4a9 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild