$ git clone -n https://src.fedoraproject.org/rpms/rust-biquad.git /var/lib/mock/f39-build-1508623-35396/root/chroot_tmpdir/scmroot/rust-biquad
Cloning into '/var/lib/mock/f39-build-1508623-35396/root/chroot_tmpdir/scmroot/rust-biquad'...
$ git fetch origin 20364d445f10b73a906042aba41396d96c11b828:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-biquad
 * [new ref]         20364d445f10b73a906042aba41396d96c11b828 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 20364d4 Initial import; Fixes: RHBZ#2224760