$ git clone -n https://src.fedoraproject.org/rpms/elementary-code.git /var/lib/mock/f40-build-2251253-54122/root/chroot_tmpdir/scmroot/elementary-code
Cloning into '/var/lib/mock/f40-build-2251253-54122/root/chroot_tmpdir/scmroot/elementary-code'...
$ git fetch origin 7bd6ff29c66cee228ea48c32f9ab7d524f02ace7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/elementary-code
 * [new ref]         7bd6ff29c66cee228ea48c32f9ab7d524f02ace7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7bd6ff2 Update to version 7.1.0