$ git clone -n https://src.fedoraproject.org/rpms/ghc-base64-bytestring.git /var/lib/mock/f38-build-side-42-init-devel-866114-28439/root/chroot_tmpdir/scmroot/ghc-base64-bytestring
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-866114-28439/root/chroot_tmpdir/scmroot/ghc-base64-bytestring'...
$ git fetch origin 1132636bc4d1fac62fc988c49bba9450a60945bc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-base64-bytestring
 * [new ref]         1132636bc4d1fac62fc988c49bba9450a60945bc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1132636 Convert to %autorelease and %autochangelog