$ git clone -n https://src.fedoraproject.org/rpms/ghc-regex-applicative.git /var/lib/mock/f40-build-1998262-44224/root/chroot_tmpdir/scmroot/ghc-regex-applicative
Cloning into '/var/lib/mock/f40-build-1998262-44224/root/chroot_tmpdir/scmroot/ghc-regex-applicative'...
$ git fetch origin 4e4e23daa37ff0f79e56a3fe36610bf3de1ef018:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-regex-applicative
 * [new ref]         4e4e23daa37ff0f79e56a3fe36610bf3de1ef018 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4e4e23d bump release