$ git clone -n https://src.fedoraproject.org/rpms/ghc-base-unicode-symbols.git /var/lib/mock/f39-build-1711923-41228/root/chroot_tmpdir/scmroot/ghc-base-unicode-symbols
Cloning into '/var/lib/mock/f39-build-1711923-41228/root/chroot_tmpdir/scmroot/ghc-base-unicode-symbols'...
$ git fetch origin 176d4e28742454e327840dbc36a78b6e015ce91b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-base-unicode-symbols
 * [new ref]         176d4e28742454e327840dbc36a78b6e015ce91b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 176d4e2 bump release