$ git clone -n https://src.fedoraproject.org/rpms/ghc-tasty-kat.git /var/lib/mock/f38-build-side-42-init-devel-1088675-30041/root/chroot_tmpdir/scmroot/ghc-tasty-kat
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1088675-30041/root/chroot_tmpdir/scmroot/ghc-tasty-kat'...
$ git fetch origin 2c83c9982925c0a208b779769549385f0d43e449:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-tasty-kat
 * [new ref]         2c83c9982925c0a208b779769549385f0d43e449 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2c83c99 Convert to %autorelease and %autochangelog