$ git clone -n https://src.fedoraproject.org/rpms/ghc-tasty-rerun.git /var/lib/mock/f38-build-side-42-init-devel-1010662-29395/root/chroot_tmpdir/scmroot/ghc-tasty-rerun
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1010662-29395/root/chroot_tmpdir/scmroot/ghc-tasty-rerun'...
$ git fetch origin 186e9cfa64d4e9fbf482aac1f85bf73feee45ace:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-tasty-rerun
 * [new ref]         186e9cfa64d4e9fbf482aac1f85bf73feee45ace -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 186e9cf Convert to %autorelease and %autochangelog