$ git clone -n https://src.fedoraproject.org/rpms/thonny.git /var/lib/mock/f40-build-2684700-67990/root/chroot_tmpdir/scmroot/thonny
Cloning into '/var/lib/mock/f40-build-2684700-67990/root/chroot_tmpdir/scmroot/thonny'...
$ git fetch origin 1dab9f9e3f727096cf953eb96285ddd6bed0783e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/thonny
 * [new ref]         1dab9f9e3f727096cf953eb96285ddd6bed0783e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1dab9f9 Convert to %autorelease and %autochangelog