$ git clone -n https://src.fedoraproject.org/rpms/ffmpegthumbnailer.git /var/lib/mock/f41-build-823134-153472/root/chroot_tmpdir/scmroot/ffmpegthumbnailer
Cloning into '/var/lib/mock/f41-build-823134-153472/root/chroot_tmpdir/scmroot/ffmpegthumbnailer'...
$ git fetch origin 0139e11496d72f73d7bca6b5ef0e9876ef6688ff:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ffmpegthumbnailer
 * [new ref]         0139e11496d72f73d7bca6b5ef0e9876ef6688ff -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0139e11 Rebuilt for https://fedoraproject.org/wiki/Fedora_41_Mass_Rebuild