$ git clone -n https://src.fedoraproject.org/rpms/ghc-language-javascript.git /var/lib/mock/f38-build-side-42-init-devel-842313-28416/root/chroot_tmpdir/scmroot/ghc-language-javascript
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-842313-28416/root/chroot_tmpdir/scmroot/ghc-language-javascript'...
$ git fetch origin 3de43fffa904e7346a49d7b407cee804e1f69448:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-language-javascript
 * [new ref]         3de43fffa904e7346a49d7b407cee804e1f69448 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3de43ff Convert to %autorelease and %autochangelog