$ git clone -n https://src.fedoraproject.org/rpms/ghc-tasty-kat.git /var/lib/mock/f39-build-1711704-41228/root/chroot_tmpdir/scmroot/ghc-tasty-kat
Cloning into '/var/lib/mock/f39-build-1711704-41228/root/chroot_tmpdir/scmroot/ghc-tasty-kat'...
$ git fetch origin 2792ba2839d7c837a73303bbd9fa0d15c8e2360c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-tasty-kat
 * [new ref]         2792ba2839d7c837a73303bbd9fa0d15c8e2360c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2792ba2 bump release