$ git clone -n https://src.fedoraproject.org/rpms/ghc-iso8601-time.git /var/lib/mock/f39-build-2167062-50995/root/chroot_tmpdir/scmroot/ghc-iso8601-time
Cloning into '/var/lib/mock/f39-build-2167062-50995/root/chroot_tmpdir/scmroot/ghc-iso8601-time'...
$ git fetch origin ca5bcb39836a186affd849bb4d9e29569f408ebd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-iso8601-time
 * [new ref]         ca5bcb39836a186affd849bb4d9e29569f408ebd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ca5bcb3 bump release