$ git clone -n https://src.fedoraproject.org/rpms/ffmpegthumbs.git /var/lib/mock/f40-build-2197533-51636/root/chroot_tmpdir/scmroot/ffmpegthumbs
Cloning into '/var/lib/mock/f40-build-2197533-51636/root/chroot_tmpdir/scmroot/ffmpegthumbs'...
$ git fetch origin e1cffcc0899b6f0c0f163422a565678f5551eb35:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ffmpegthumbs
 * [new ref]         e1cffcc0899b6f0c0f163422a565678f5551eb35 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e1cffcc 24.01.85