$ git clone -n https://src.fedoraproject.org/rpms/python-convertdate.git /var/lib/mock/f39-build-1554135-37033/root/chroot_tmpdir/scmroot/python-convertdate
Cloning into '/var/lib/mock/f39-build-1554135-37033/root/chroot_tmpdir/scmroot/python-convertdate'...
$ git fetch origin ef8d86ff65445c407127f42562a0617d298548a5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-convertdate
 * [new ref]         ef8d86ff65445c407127f42562a0617d298548a5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ef8d86f Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild