$ git clone -n https://src.fedoraproject.org/rpms/aws.git /var/lib/mock/f39-build-1917949-42931/root/chroot_tmpdir/scmroot/aws
Cloning into '/var/lib/mock/f39-build-1917949-42931/root/chroot_tmpdir/scmroot/aws'...
$ git fetch origin 0e8dc5f087b2f5ce313a70c8c90ffc5f7ca6100b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/aws
 * [new ref]         0e8dc5f087b2f5ce313a70c8c90ffc5f7ca6100b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0e8dc5f Use the macro py3_shebang_fix.