$ git clone -n https://src.fedoraproject.org/rpms/rust-quinn.git /var/lib/mock/f40-build-2269328-54765/root/chroot_tmpdir/scmroot/rust-quinn
Cloning into '/var/lib/mock/f40-build-2269328-54765/root/chroot_tmpdir/scmroot/rust-quinn'...
$ git fetch origin 3b495f5fb06b7a19b005a0fee614210c31e04b62:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-quinn
 * [new ref]         3b495f5fb06b7a19b005a0fee614210c31e04b62 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3b495f5 Initial import (#2246723)