$ git clone -n https://src.fedoraproject.org/rpms/ffmpegthumbs.git /var/lib/mock/f41-build-846088-162961/root/chroot_tmpdir/scmroot/ffmpegthumbs
Cloning into '/var/lib/mock/f41-build-846088-162961/root/chroot_tmpdir/scmroot/ffmpegthumbs'...
$ git fetch origin 3664ff2760ef9379275efc68a10c947136649b8f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ffmpegthumbs
 * [new ref]         3664ff2760ef9379275efc68a10c947136649b8f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3664ff2 24.08.0